The Clay County Public Health Center says the mother and sibling of a child with measles have also been diagnosed with the disease.

All three live in the same household and are under medical care at home, the health department said.

Advertisement

"This disease can be easily transmitted from person to person in a closed environment," said Clay County Director of Public Health Gary Zaborac. "It is not unexpected to see a cluster of Measles cases occur within the same household."

Measles is highly contagious and can have serious side effects, according to the health department. Symptoms appear in 7 to 14 days, but can occur as late as 21 days after exposure.

People are not at risk of getting measles if they are immune. You're considered immune if you have received two doses of Measles, Mumps and Rubella (MMR) vaccine, or were born before Jan. 1, 1957, or you have a history of laboratory-confirmed measles or a blood test confirming measles immunity.